# Cupertino packetizer - on chunk ready? **URL:** \ **Category:** Wowza Developer Dojo\ **Tags:** wowza-streaming-server-java-api\ **Created:** [June 4, 2014, 12:04pm UTC](https://community.wowza.com/t/cupertino-packetizer-on-chunk-ready/42677 "2014-06-04T12:04:15Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Anisa\_Egeli](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@Anisa\_Egeli](https://community.wowza.com/u/Anisa_Egeli)\ **Post date:** [June 4, 2014, 12:04pm UTC](https://community.wowza.com/t/cupertino-packetizer-on-chunk-ready/42677/1 "2014-06-04T12:04:15Z")
Is there a way that I can add a listener or extend a class, etc., so that I can run code on the event of the first chunk of a cupertino stream being ready? ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [June 9, 2014, 10:50pm UTC](https://community.wowza.com/t/cupertino-packetizer-on-chunk-ready/42677/2 "2014-06-09T22:50:14Z")
I assume, probably you mean for a live stream, and I don’t there is a way to do that. For vod you could use IHTTPStreamerCupertinoVODActionNotify.onFillChunkEnd() Richard ---
**Author:** ![Maanas\_Royy](https://avatars.discourse-cdn.com/v4/letter/m/85e7bf/32.png) [@Maanas\_Royy](https://community.wowza.com/u/Maanas_Royy)\ **Post date:** [June 12, 2014, 11:15pm UTC](https://community.wowza.com/t/cupertino-packetizer-on-chunk-ready/42677/3 "2014-06-12T23:15:23Z")
I m trying to implement IHTTPStreamerCupertinoVODActionNotify2 following this example [https://www.wowza.com/docs/how-to-convert-ontextdata-events-in-a-live-or-vod-stream-to-timed-events-id3-tags-in-an-apple-hls-stream](https://www.wowza.com/docs/how-to-convert-ontextdata-events-in-a-live-or-vod-stream-to-timed-events-id3-tags-in-an-apple-hls-stream) I m not able to fire the onFillChunkEnd event